Ion 100 R & Flare R City Bike Light Set (2026)

One light set for a complete Daytime Running Lights solution. The 2026 Ion 100 R and Flare R City feature focused optics and an interruptive flash pattern to help ensure visibility from up to 900m during the day. Integrated side lights help add visibility to this compact and powerful rear Daytime Running Light set.

LED fuel gauges provide easy visibility of battery status for up to 20 hours of runtime. Blendr compatibility and the included quick-connect bracket offer simple removal for recharging via the included USB-C cable.

Trek Ion 100 R & Flare R City Features

• Specifically designed focus, flash, and range flash patterns for powerful daytime visibility for up to 900m away
• Includes Ion 100 R, Flare R City, two quick connect brackets, and a USB-C cable
• Increased battery capacity offers up to 28% more run time than previous generations
• Visible fuel gauge LEDs make it easy to see battery status
• Integrated side lights increase visibility from more angles, perfect for city and urban use
• Blendr compatible for mounting to handlebar, stem, or helmets with optional accessories
• Ion 100R- 100LM high beam 2hrs, 5LM low beam 20hrs, 100LM flash 9hrs, charge time 2hrs
• 20LM high beam – 4hrs, 2LM low beam – 24hrs, 35LM day flash – 10hrs, charge time 1.5hrs

Trek Ion 100 R & Flare R City Specs